MESON Chess Problem Database

Problem Display
PID: 125354 (B7/8/pB6/Q3K3/5P2/2N3pp/P3R2b/3N1k2 w - - 0 1)

Podushkin, S

Source?, 1972

B7/8/pB6/Q3K3/5P2/2N3pp/P3R2b/3N1k2

#2

9 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Re3?
      • 1...Kg1
        • 2.Re1#
      • 1...Bg1
        • 2.Qxa6#
      • 1...g2!
    • 1.Re4?
      • 1...Kg2
        • 2.Re1#
      • 1...g2
        • 2.Qxa6#
      • 1...Bg1!
    • 1.Qc5?
      • 1...g2
        • 2.Qf2#
      • 1...Bg1
        • 2.Qxg1#
      • 1...a5!
  • Keys
    • 1.Qxa6!
      • 1...g2
        • 2.Re4#
      • 1...Bg1
        • 2.Re3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);
      • Vars
        • K(a);P-FLIGHT::B(H)+R(C),DCHECK
        • B(b);SBLOCK::QAB(F),XP(e)
      • Refutation
        • P(c);P_PINP(E)
    • Try
      • R(C);
      • Vars
        • K(a);S_FLIGHT::B(I)+R(C)
        • P(c);P_PINP(E),SBLOCK::QAB(F),XP(e)
      • Refutation
        • B(b);
    • Try
      • Q(F);
      • Vars
        • P(c);N_GUARD,P_PINP(E)::QAR1(F)
        • B(b);N_GUARD::QAR1(F),XB(b)
      • Refutation
        • P(e);
  • Actual
    • Q(F);XP(e)
    • Vars
      • P(c);P_PINP(E),SBLOCK::QAB(F)+R(C)
      • B(b);SBLOCK::QAB(F)+R(C)
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